Mixer
ATMOSYNTH built-in module
Sums up to four inputs into one, each at its own level. The output level is a modulation input as well as a knob: patch an LFO into Output level for a tremolo, where Output level is the middle of the swing and Output level depth how far it moves either side. Each channel's level is an input as well, with a depth of its own: an envelope into Level 2 fades that input in under the others as a note starts, and two LFOs out of step crossfade between two sounds.
Four notes played on Keys, passing through it on their way out.